Road structure – process – or apparatus – Apparatus – Automatic control
Patent
1989-07-18
1990-12-18
Kisliuk, Bruce M.
Road structure, process, or apparatus
Apparatus
Automatic control
404118, 33DIG21, 172 45, 356152, E01C 1922, E01C 2301, G01C 906
Patent
active
049782460
ABSTRACT:
A guidance system and method for increasing the accuracy of laser guided machines such as screeds, graders, earth movers, floor saws and floor finishing machines. The system includes a laser beam receiver for sensing a laser reference beam provided off the machine. The laser receiver signals an electrical circuit when the laser beam is sensed in both centered and off-center regions. The electrical circuit operates a controller such as a solenoid operated fluid valve which controls a power source such as a fluid cylinder to move a machine element in one direction, such as raising a concrete screed, when the beam is sensed in the centered region, and in the other direction, such as lowering the screed, when the beam is sensed off-center. The method includes controlling the power source to continuously cycle the machine element between centered and off-centered regions to reduce the dead band, i.e., nonactive tolerance range, of the system.
REFERENCES:
patent: 3069983 (1962-12-01), Pizzarotti et al.
patent: 3873226 (1975-03-01), Teach
patent: 3887012 (1975-06-01), Scholl et al.
patent: 3953145 (1976-04-01), Teach
patent: 4162708 (1979-07-01), Johnson
patent: 4273196 (1981-06-01), Etsusaki et al.
patent: 4371287 (1983-02-01), Johansson
patent: 4655633 (1987-04-01), Somero et al.
Drawing No. 1HI-1999, entitled "Current Laser Machine Control Circuit", showing hydraulic electric control circuit for laser screeding apparatus of the type shown in U.S. patent application Ser. No. 07/291,678, filed Dec. 29, 1988.
Quenzi Philip J.
Somero David W.
LandOfFree
Apparatus and method for controlling laser guided machines does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for controlling laser guided machines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for controlling laser guided machines will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1422762